A Phase-Locked Loop for the Synchronization of Power Quality Instruments in the Presence of Stationary and Transient Disturbances

2007 ◽  
Vol 56 (6) ◽  
pp. 2232-2239 ◽  
Author(s):  
Antonio Cataliotti ◽  
Valentina Cosentino ◽  
Salvatore Nuccio
Keyword(s):  
Power Quality ◽  
Phase Locked Loop ◽  
Transient Disturbances ◽  
Quality Instruments

scholarly journals Review of Legal Aspects of Electrical Power Quality in Ship Systems in the Wake of the Novelisation and Implementation of IACS Rules and Requirement

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3151
Author(s):  
Janusz Mindykowski ◽  
Tomasz Tarasiuk ◽  
Piotr Gnaciński
Keyword(s):  
Power Quality ◽  
Distribution Systems ◽  
International Association ◽  
Electrical Power ◽  
Harmonic Distortion ◽  
Legal Aspects ◽  
Electrical Distribution Systems ◽  
Transient Disturbances ◽  
Legislative Changes

This paper deals with new challenges regarding power quality in ship technology resulting from the novelisation and implementation of IACS (International Association of Classification Societies) rules and requirements. These rules, known as IACS E24 2016/2018, address harmonic distortion for ship electrical distribution systems, including harmonic filters. The reasons for the legislative changes based on a short overview of power quality-related accidents are discussed, after which a brief presentation of the updated IACS rules illustrated by a related DNV GL (Det Norske Veritas Germanischer Lloyd) case study is shown. A key part of this paper includes proposals concerning harmonics and interharmonics, distortion indices and transient disturbances. The aim of these proposals is to unify power quality indices and measurement procedures to maintain effective and comparable criteria for monitoring distortion and establish requirements for ship owners, designers, shipbuilders, classifiers, and crew members of marine objects.

Classification of Power Quality Problems by Wavelet Fuzzy Expert System

2012 ◽  
Vol 463-464 ◽  
pp. 1573-1578
Author(s):  
N. Karthik ◽  
Shaik Abdul Gafoor ◽  
M. Surya Kalavathi
Keyword(s):  
Expert System ◽  
Power Quality ◽  
Intelligent System ◽  
Fuzzy Expert System ◽  
Quality Problem ◽  
Electric Power Quality ◽  
Transient Disturbances ◽  
Key Issues ◽  
Power Utilities

Electric power quality, which is a current interest to several power utilities all over the world, is often severely affected by harmonics and transient disturbances. There is no unique model which can assess the power quality problem and to identify and classify them properly. Existing automatic recognition methods need improvement in terms of their versatility, reliability, and accuracy. The FUZZY LOGIC based tools have been applied for the PQ classification. This paper addresses Power quality problem classification by wavelet and fuzzy expert system. Major Key issues and challenges related to these advanced techniques in automatic classification of PQ problems are highlighted. New intelligent system technologies using DSP, expert systems, AI and machine learning provide some unique advantages in intelligent classification of PQ distortions

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